Waste-gate



UNITED STATES PATENT OFFTCE.

HIRAM YAW, OF BOSTON, AND THOS. P. HOW, OF BUFFALO, NEW YORK.

WASTE-GATE.

Specification of Letters Patent No. 7,468, dated June 25, 1850.

To all whom it may concern Be it known that we, HIRAM YAw, of Boston,inthe county of Erie and State of New York, and THOMAS P. How, ofBuffalo, in the county of Erie and State of New York, have invented anew and Improved Waste- Gate, of which we hereby declare the followingto be a full and exact description, reference being had to theaccompanying drawings and to the letters of reference marked thereon.

The nature -of our invention consists in providing mill ponds, canals,and reservoirs, with a waste gate hung upon a vertical axis the lowerpart of which is made Y wider one side of the axis than it is the other,the side which is narrowest toward the bottom of the gate beingsufficiently wider than the other toward the top that the balance of thepressure of the water will change from one side of the axis to theother, and open and close the gate as the water rises and falls.

Figure 1, in the accompanying drawings isa perspective view representinga gate of this description hung in a fiume. A represents the gate whichis hung in its place upon journals represented by the dotted lines e, e,and also clearly shown in Fig. 2, which is a side elevation of the gate.Then the water rises to the dotted line o, the pressure upon one side ofthe axis is balanced by that on the other, but if the water rises ashort distance above that point, the pressure is greater one side of theaxis than it is the other and the gate is thrown open, and when thewaterfalls af short distance below that point, the pressure is greatestthe other side of the axis, and the gate will shut.

Figs. 3, 4L and 5 show gates ofV different proportions built upon thesame principle.

What we claim as our invention and desire to secure by Letters Patent,is-

A waste gate which is hung upon a vertical axis the lower part of whichis made wider one side of the axis than it is the other, the side whichis narrowest toward the bottom of the gate being sufiiciently wider thanthe other toward the top, that the balance of the pressure of the waterwill change from one side of the axis to the other, and open and closethe gate as the Water rises and falls.

HIRAM YAVV. THOMAS P. HOW.

Witnesses: f

H. B. BURT, L- LE- CLEAR,

